Liquid Definition and 990 Threads

Sirs, I have always understood that water cannot be compressed but I have been informed by competent people that it can. We use water jet cutting at 60KPSI and I am told that this water compresses by 13%. While I can accept this I do not understand why at app. 150K PSI the water freezes and that...

Hi all I would like to know how to calculate the volume of liquid gas (CO2) inside a cylinder of 50L. Its for a medical centrifuge machine and we will have problems with high G's that will move the liquid to the sides... (and could block the valve) Any formulas help? (i don't have...

I am suppose to find the density of a thick syrup-like liquid (does not disperse). The only information I have is that when a small portion is poured into a cup of unknown volume, it takes 5 seconds for it to reach the bottom. The cup has a height of 12 cm. I am not sure how to approach...

hi i've got to do measure hte refractive index of a liquid with mirror and lens first of all how can i measure hte refractive index of air in this way? i don't get how i can do this, please explain :| and then for the liquid, I've been told to put the liquid over the mirror and then the...

A 1.90 m-diameter vat of liquid is 2.70 m deep. The pressure at the bottom of the vat is 1.30 atm. What is the mass of the liquid in the vat? I found the density of the fluid but now I'm stuck and I really can't get my mind around this even though i know its going to turn out being so...

it takes an input of energy to convert liquid to vapour ,so increse the entropy if an increase in entropy is natural, why does this not happen naturally with less effort on its own?

Liquid nitrogen! No, I don't have any, but I WANT SOME. I have no idea how to proceed. How much does it cost, flask included, and where can I get it? Do I have to use all of it right away, or can I store it for more than a few days? What kind of saftey should be taken into consideration besides...

I'm not sure if this is the appropriate subforum, but here it goes: Suppose you have a particle, with the mass m, at the bottom of jar which is filled with liquid. The particle is shot upwards, parallel to the gravitational force, with the speed v0. The drag force is proportional to the...

This questions puzzles me: Which has a larger specific heat capacity (shc) : solid, liquid or gas. We can assume that it is of the same matter. Why? I have checked the numbers. Only water has it on all three states. Liq water has the highest, while that of ice and steam is about the same...

When a liquid is put under pressure, it doesn't get compressed very much. So where is the extra force that the liquid molecules push back with, coming from? Is it electron clouds getting squished together and pushing back with electrostatic repulsion - or Pauli exclusion force - or what...

Hey, I have this homework thing where I have to model an object's motion through a viscous liquid. I'm to assume that the resistive force directed upward is kv. Now, I'm going to take the downward direction as positive and the up as negative.. Should my force equation be mg - kv = m(dv/dt)...

# A Fresnel biprism arrangement used to study interference in air is immersed completely in a liquid. Will the fringe width increase, decrease or remain unchanged?

In the figure that shows saturated vapor and liquid condition under varying temperature and specific volume (constant temperature), there are 2 lines, 1 is saturated liquid line, the other is saturated vapor line. so the region in between these 2 lines is called the mixture of saturated liquid...

How can I cheaply make a translucent liquid with the same texture as shampoo? I though of dissolving lots of suger in water to get a semi-thick liquid. Whats a good way to make the sugerwater stay in a liqid state without crystalizing? Is there an easier way (to make what I want)? Thanks.

A water pipe having a 2.6 cm inside diameter carries water into the basement of a house at a speed of 0.90 m/s and a pressure of 240 kPa. If the pipe tapers to 1.6 cm and rises to the second floor 7.5 m above the input point, what are the (a) speed and (b) water pressure at the second floor...

I was wondering if anyone could point me towards a source about making constant head devices. I was wanting to measure and then relate, experimentally, the velocity of a stream to its cross-sectional area. Since this will be done mostly at home using pedestrian tools, I need to find out how I...

Hi. This is a two part question, I'm pretty sure about the first bit but in the second part my answer seems a bit weird. Not the order of magnitude I was expecting. Just wondering can anyone confirm or deny my suspician? Point me in more correct direction if I am indeed wrong. This isn't for...

A liquid water turbine receives 2kg/s water at 2000kPa, 20C, and velocity of 15m/s. The exit is at 100kPa, 20C and very low velocity. Find specific work and power produced. From my tables I get hi=85.82 kJ/kg he=84.03 kJ/kg Energy equation reduces to: \begin{array}{l} h_i +...

How many places in the solar system do think have liquid water in significant quantities(I would consider the quantities on Enceladus to be significant, and the quantities on Mars to be insignificant)? I'd bet there are a half dozen or more moons that have liquid water, but does anyone else...

We have the following expression for the temperature of the latent heat of vaporisation: d(L/T)/dT = (Cpv - Cpl)/T + [d(Vv - Vl)/dT] *dP/dT Where Cpv is the heat capacity at constant pressure of the vapour and the liquid respectively, Vv and Vl are the volumes of the vapour and liquid...

This is a long shot, but maybe someone will know or can point me in the right direction. I'm looking for an experimental value for the contact angle between tetrahydrofuran (THF) with both mica and graphite substrates. I've done numerous googling and also did a search on the web of knowledge...

Hi, *** for the ones that don't like to read much (:smile:): the basic point is that I need a gas that gives as much pressure as possible with a temperature increase and a constant volume and that is easy to get my hands on; and a liquid with a high density (like mercury or something) that...

didn't know where to post it so I put it hereo:) do you guys agree with the following? http://encyclopedia.thefreedictionary.com/glass

Hello everybody, I need to search for techniques for the next problem: I have a germ/cell and I want to put it inside a liquid drop. I need to build such an electronic tool, so the "customer" will take his different liquids, and automaticly, the "machine" will put a germ inside each liquid...

Liquid helium is stored at its boiling-point temperature of 4.2 K in a spherical container (r = 0.251 m). The container is a perfect blackbody radiator. The container is surrounded by a spherical shield whose temperature is 72.8 K. A vacuum exists in the space between the container and shield...

Hi all Just a quick (relatively simple) question.. As high school physics/chem tought, a liquid of lower density will float uopn that of a higher density. This makes sense in most situations because of the pressure gradient in the higher-density liquid pushing the other fluid upwards. But...

Liquid sodium can exist at room temperature at EXTREMELY high pressures. Why?

What do you think is better? Lets start a debate!

Hi, I have started Plysics 20 by correspondence and I can't find the answer to this question: The reason that liquid nitrogen temperature superconductors are important is that liquid nitrogen costs less than liquid helium. New technologies to store liquid helium have been developed in the...

http://arxiv.org/abs/gr-qc/0509091 A liquid crystal analogue of the cosmic string "We consider the propagation of light in a anisotropic medium with a topological line defect in the realm of geometrical optics. It is shown that the effective geometry perceived by light propagating in such...

Hey I'm starting to build liquid fueled rockets.(built 1 but injecter didnt work properly :eek: ) Does anyone have any plans to build a rocket or at least some tips. :smile:

Dear folks, Please help me out. I store my purified protein samples at -20C and they are still at the liquid form (a few are frozen) at this temperature! :cry: I used Trizol kit to purify them and dissolved them in a solution of 9M urea, 4% CHAPS and 30mM Tris/HCl pH 8.5 buffer. They had...

so, i was just in the shower after my mum cut my hair, and i went for my towel cos i had shampoo on my face, then all of a sudden with my eye's shut i bend over and cough out, quite easily, what i later discovered to be snot, greenish mucus, and a small amount of blood in the centre... now...

Can you give me some advice on this: ------------ Are you in a position to supply us the below item: Please let me know the price as CFR Bandarabbas Iran. Subject : vertical liquid oxygen tank (lox tank) capacity: 18000_22000 lit working pressure : 17 bar Daily...

I am doing a project on water hammer. I need the formula for the bulk modulus of a liquid not just for water. Can anyone provide me with the formula?

Hi ! i'm looking for some paper about the liquid drop model, and why we can use the langevin equation (initialy designed for brownian motion) to describe fission process (here brownian particle is collective variable such as quadripolar momenta) thank you

Hey, As part of an investigation, I constructed a basic centrifuge consisting of a fast rotating beaker filled with liquid. I have observed that an increased angular velocity forces the liquid out of the centre and further up the sides of the centrifuge, as expected. However, I am having...

Please help me in this. Are gel, cream and paste liquids? I'm getting the answer for primary school students. So, please help me explaining in simple way. Thank you! Igid

the surface tension of a liqud at its boiling point is what?

Oentane is a liquid with a vapor pressure of 512 Torr at 25C; at the same temperature, the vapor pressure of hexane is only 151 Torr. what composition must the liquid phase have if the gas hase composition is to have equal amounts of pentane and hexane? Do I use p = i M R T to solve for the...

Calculated the time it takes for a liquid to freeze ?? hello fellow Mathematicians. I was just wanting to know the equation used to calculate how long it takes for something to freeze. I am assuming this equation has a constant 0c (32f) which is the freezing point. It would also be nice if...

So i have been doing thsi question for about a week now and it's about liquid nitrogen. Here it is. Liquid nitrogen is used in many low-temperature experiments. It is widely available, and cheaper than gasoline! How much heat must be removed from room temperature (20C) nitrogen gas to...

Hello, I'm with a group called RINO (would give you a webiste, but don't have one yet). In Holland we go to schools to do shows with liquid nitrogen. At the moment we're trying to improve our show, so we're thinking about new experiments. I was hoping some of you might have a great suggestion...

What ratio of liquid nitrogen to water must there be for total solidification of water (@ RTP)? If there is no static ratio a simplified equation would be nice... 10x!

On tuesday I tried to estimate how much liquid I had in a round bottom flask, but I realized I had no idea how to get a number. The liquid was about 2cm high, the entire flask is 6cm tall, and the volume of the flask when full is 100mL. How would I calculate/estimate the amount of liquid in the...

This is sort of an unusual question (and I'm not even sure this is the right forum for it) but here goes. I'm doing a project where theoretically a human would be kept immersed in a liquid for long periods of time and I'm wondering what liquid would be the best for this. The most obvious...

You place 2 beakers at 25 degrees celsius on a hot plate. Beaker A = 100.00 mL liquid Mercury Beaker B = 100.00 mL liquid Water Each absorb 15 KJ of heat. What is the final temp. of each liquid?

If 277 L of LIQUID hydrogen has a mass of 19.7 kg, what volume will this amount of hydrogen occupy as a GAS at 25 degrees celcius and 1 atm? Is there some kind of equation that I can use to make this problem easier? THANKS!

A man takes a bottle with a white liquid in it. He puts a little bit of it on his forearm. He does it every day. What does he do?

"A liquid is flowing through a horizontal pipe whose radius is 0.0200 m. The pipe bends straight upward through a height of 10.0m and joins another horizontal pipe whose radius is 0.0400 m. What volume flow rate will keep the pressures in the two horizontal pipes the same?" Alright, I was...